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US 10,308,829 B2Granted
Moisture-and peroxide-crosslinkable polymeric compositions
AssigneeDow Global Technologies LLC
InventorBharat I. Chaudhary
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Abstract
Crosslinkable polymeric compositions comprising a polyolefin having hydrolyzable silane groups, an organic peroxide, and optionally a silanol condensation catalyst. Such crosslinkable polymeric compositions are crosslinkable via a combination of peroxide crosslinking and moisture curing. Such crosslinkable polymeric compositions can be employed in the production of various articles of manufacture, such as coated conductors.
Claims8
A crosslinkable polymeric composition, comprising:
- (a) a polyolefin having hydrolyzable silane groups;
- (b) an organic peroxide;
- and
- (c) a silanol condensation catalyst, which is a sulfonic acid or a blocked sulfonic acid;
- wherein said polyolefin having hydrolyzable silane groups is present in an amount in the range of from 96 to 99.49 weight percent based on the entire weight of components (a) through (c);
- wherein said organic peroxide is present in an amount in the range of from 0.5 to 3 weight percent based on the entire weight of components (a) through (c);
- wherein said silanol condensation catalyst is present in an amount in the range of from 0.01 to 1 weight percent based on the entire weight of components (a) through (c);
- wherein said crosslinkable polymeric composition further comprises d) up to 5 parts per hundred of one or more additives selected from the group consisting of cure boosters, scorch retardants, tree retardants, heat and light stabilizers, fillers, pigments, and antioxidants, based on 100 weight parts of said polyolefin.
5 more elements
A process for producing a crosslinked polymeric composition, said process comprising:
- (1) forming a crosslinkable polymeric composition comprising (a) a polyolefin having hydrolyzable silane groups, (b) an organic peroxide, and (c) a silanol condensation catalyst, which is a sulfonic acid or a blocked sulfonic acid, wherein said polyolefin having hydrolyzable silane groups is present in an amount in the range of from 96 to 99.49 weight percent based on the entire weight of components (a) through (c);
- wherein said organic peroxide is present in an amount in the range of from 0.5 to 3 weight percent based on the entire weight of components (a) through (c);
- wherein said silanol condensation catalyst is present in an amount in the range of from 0.01 to 1 weight percent based on the entire weight of components (a) through (c);
- wherein said crosslinkable polymeric composition further comprises d) up to 5 parts per hundred of one or more additives selected from the group consisting of cure boosters, scorch retardants, tree retardants, heat and light stabilizers, fillers, pigments, and antioxidants, based on 100 weight parts of said polyolefin;
- (2) subjecting said crosslinkable polymeric composition to conditions sufficient to induce crosslinking in at least a portion of said crosslinkable polymeric composition via said organic peroxide;
- and
- (3) subjecting said crosslinkable polymeric composition to conditions sufficient to induce crosslinking in at least a portion of said crosslinkable polymeric composition via said hydrolyzable silane groups and said silanol condensation catalyst, thereby producing said crosslinked polymeric composition.
4 more elements
Dependencies are inferred from the claim text.